No oil presure JD 420......

An interesting story. Since you have the oil pan off I think I would proceede with pulling the poil pump and checking it out on the bench.

At this point I would be stumped also, but if the oil pump is turnign and working some it should be at least pushing pil up to the guage hole in the filter housing.

If you jerk the pump out let us know what you find. That maneuver won't cost you a dime.

I know what you are going thru on that manual issue.

My greasy service manual is out in the barn so maybe I am wring there. As i foggily recall you can take the two bolts/studa out that hold the pump in place and it will just drop out. Wouldn't it be easier to do it that way and then just throw it up on the bench and check it out?

If yu do that you will have to time the thing when putting back in, and above all take the distributor out before reinstalling the oil pump.

There have been a few folks on the board that were more than willing to help me thru the refering to the 40 manual deal.

Some history would still be helpful.

Was it running when you took it apart

Did it have oil pressure then

did you have the cam out

did you put new cam bearings in

Later and let us know - I wuld think something has got to turn up when you drop that pump. Surely there is enough room for it to clear the crank and drop out.